Great to hear things are working smoothly at your end.
We don't recommend using zCaches as a tool for shot work. Currently it's designed as more of an authoring tool where you can test some animation in your scene and scrub the timeline to inspect the solver results with all the attachments, collisions, tets etc visible.
The recommended workflow is to export the geometry from various passes as alembic caches, and then import those caches into the downstream pass to drive the solve in that pass. See the following image (right click, open in new tab to zoom in):
The point cache between each pass is just the Alembic or other caching tool you wish to use.